Defamation Bill: A confusing vote from the Lib Dems

I've written previously about the Defamation Bill, and I've written again to my MP Don Foster:

Reading the Commons debate on 16th April on the Defamation Bill, I was disappointed to see that you voted for rejecting the Lords' second amendment which would have restricted companies from suing individuals.

Update: Don's office have replied with:

Lib Julian Huppert and Simon Hughes managed to get the Government to agree to a revised amendment. You can read about it here.

I am a bit confused as to why the Lib Dems voted in favour of rejecting the Lords' second amendment, but then seem to be including it again. I think I probably don't understand these things properly!